Chess engines STRUGGLING to solve this puzzle

Discussion of anything and everything relating to chess playing software and machines.

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Chessqueen
Posts: 5685
Joined: Wed Sep 05, 2018 2:16 am
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Full name: Jorge Picado

Re: Chess engines STRUGGLING to solve this puzzle

Post by Chessqueen »

peter wrote: ↑Thu Dec 28, 2023 6:00 pm
Chessqueen wrote: ↑Thu Dec 28, 2023 5:56 pm
DmitriyFrosty wrote: ↑Thu Dec 28, 2023 5:52 pm
peter wrote: ↑Thu Dec 28, 2023 5:46 pm https://www.yacpdb.org/#search/MmtyNEsx ... MS8xLzA=/1

Single thread (3.5GHz):

2kr4/K1pp4/1p6/8/8/8/7Q/3R4 w - - 0 1

Analysis by Stockfish dev-20231202-08cdbca5:

Code: Select all

1.Dh7 b5 2.Dg7 b4 
  Weiß steht klar auf Gewinn.  
  +- (5.98)  Tiefe: 10/6   00:00:00
...
1.Tc1 d6 2.Dh7 Td7 3.Dh8+ Td8 4.Dg7 Td7 5.Df8+ Td8 6.Df5+ Td7 7.Te1 c6+ 8.Kxb6 Kb8 9.Te8+ Td8 10.Txd8# 
  Weiß setzt Matt.  
  +- (#10)  Tiefe: 17/26   00:00:00  37kN
1.Dd6 cxd6 2.Tc1# 
  Weiß setzt Matt.  
  +- (#2)  Tiefe: 18/26   00:00:00  38kN
...
1.Dd6 cxd6 2.Tc1# 
  Weiß setzt Matt.  
  +- (#2)  Tiefe: 245/4   00:00:00  59kN
Syzygy Probe Limit 0, regards
Try Alexandria :D

FEN: n1QBq1k1/5p1p/5KP1/p7/8/8/8/8 w - - 0 1

Alexandria-5.1.0-avx2:
1/1 00:00 38 38k +0.95 g6xh7+
2/3 00:00 126 126k +1.23 g6xh7+ Kg8-h8 Qc8xa8
3/7 00:00 319 319k +3.67 Bd8-c7 Qe8-f8
4/7 00:00 470 470k +M12 Bd8-c7 Na8xc7
5/8 00:00 757 757k +9.39 Bd8-c7 Na8xc7 g6xf7+ Kg8-f8 f7xe8Q+ Nc7xe8+ Kf6-e6 h7-h6
6/9 00:00 878 439k +M12 Bd8-c7 Na8xc7 g6xf7+ Kg8-f8 Qc8xc7 Qe8-e6+
7/9 00:00 1k 508k +51.05 Bd8-c7 Na8xc7 g6xf7+ Kg8-f8 Qc8xc7 Qe8-e6+ Kf6xe6 h7-h6 Qc7-e7+
8/20 00:00 13k 471k +0.01 g6xf7+ Qe8xf7+ Kf6-e5 Qf7-e8+ Ke5-d4 Na8-b6 Qc8-g4+ Qe8-g6 Qg4xg6+ h7xg6 Bd8xb6 a5-a4
9/22 00:00 27k 464k -0.01 g6xf7+ Qe8xf7+ Kf6-e5 Qf7-e8+ Ke5-f6 Qe8-f8+ Kf6-e5 Na8-c7 Qc8xc7 Qf8-g7+ Qc7xg7+ Kg8xg7 Ke5-d4 Kg7-g6 Kd4-c3 Kg6-f5
10/23 00:00 45k 476k -0.07 g6xf7+ Qe8xf7+ Kf6-e5 Qf7-e8+ Ke5-f6 Qe8-f8+ Kf6-e5 Na8-c7 Qc8xc7 Qf8-g7+ Qc7xg7+ Kg8xg7 Ke5-d4 Kg7-f7 Kd4-c3 Kf7-e8 Bd8-b6
11/24 00:00 102k 487k -0.23 g6xf7+ Qe8xf7+ Kf6-e5 Qf7-e8+ Ke5-f6 Qe8-f8+ Kf6-e5 Na8-c7 Qc8xc7 Qf8-g7+ Qc7xg7+ Kg8xg7 Ke5-d4 Kg7-f7 Kd4-c3 Kf7-e8 Bd8-b6 Ke8-d7 Kc3-b2 Kd7-c6 Bb6-d8
12/26 00:00 193k 501k -0.16 g6xh7+ Kg8-h8 Qc8xa8 Qe8-e6+ Kf6-g5 Qe6-e5+ Kg5-h4 Qe5-f4+ Kh4-h3 Kh8xh7 Bd8xa5 f7-f6 Ba5-d2 Qf4xd2 Qa8-e4+ Kh7-h6 Qe4-h4+ Kh6-g6 Qh4-g3+ Qd2-g5 Qg3-b3
13/26 00:00 254k 509k 0.00 g6xh7+ Kg8-h8 Kf6-f5 Kh8xh7 Kf5-f6 Qe8-h8+ Kf6xf7 Qh8-g7+ Kf7-e8 Na8-c7+ Qc8xc7 Qg7xc7 Bd8xc7 Kh7-g6 Bc7xa5
14/26 00:00 277k 512k 0.00 g6xh7+ Kg8-h8 Kf6-f5 Kh8xh7 Kf5-f6 Qe8-h8+ Kf6xf7 Qh8-g7+ Kf7-e8 Na8-c7+ Qc8xc7 Qg7xc7 Bd8xc7 Kh7-g6 Bc7xa5
15/26 00:00 298k 508k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2
16/27 00:00 307k 508k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2
17/27 00:00 312k 509k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q
18/27 00:00 316k 509k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1
19/27 00:00 320k 510k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2
20/27 00:00 324k 511k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q
21/27 00:00 328k 512k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1
22/27 00:00 331k 512k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+
23/27 00:00 333k 512k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+
24/27 00:00 336k 512k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
25/27 00:00 339k 512k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
26/27 00:00 343k 512k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
27/27 00:00 349k 511k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
28/27 00:00 353k 512k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
29/27 00:00 358k 512k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
30/27 00:00 365k 513k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
31/27 00:00 376k 513k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
32/27 00:00 393k 514k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
33/29 00:00 408k 516k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
34/31 00:00 425k 518k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
35/31 00:00 450k 521k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
36/31 00:00 485k 524k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
37/31 00:00 514k 526k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
38/35 00:01 586k 529k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
39/35 00:01 653k 528k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
40/35 00:01 718k 531k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
41/38 00:01 856k 535k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
42/42 00:06 992k 533k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
43/42 00:06 1,148k 165k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
44/42 00:07 1,434k 192k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
45/42 00:07 1,712k 215k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
46/42 00:08 1,916k 230k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
47/42 00:08 2,268k 254k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
48/42 00:09 2,792k 283k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
49/42 00:10 3,218k 303k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
50/44 00:11 3,816k 326k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
51/44 00:13 4,606k 350k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
52/44 00:24 11,521k 479k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
53/44 00:24 11,978k 481k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
54/44 00:26 13,058k 486k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
55/44 00:28 13,959k 490k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
56/44 00:30 15,269k 494k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
57/44 00:34 17,368k 500k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
58/44 00:37 19,047k 504k +M12 Bd8-c7 Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+
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Chessqueen
Posts: 5685
Joined: Wed Sep 05, 2018 2:16 am
Location: Moving
Full name: Jorge Picado

Re: Chess engines STRUGGLING to solve this puzzle

Post by Chessqueen »

[pgn][Event "Computer chess game"] [Site "DESKTOP-4QNC0GS"] [Date "2023.12.28"] [Round "?"] [White"Alexandria-5.1.0-avx2"] [Black "Stockfish-windows-x86-64-avx2x"] [Result "1-0"] [BlackElo "3555"] [Time "11:10:49"] [WhiteElo "3500"] [TimeControl "120+1"] [SetUp "1"] [FEN "n1QBq1k1/5p1p/5KP1/p7/8/8/8/8 w - - 0 1"] [Termination "normal"] [PlyCount "10"] [WhiteType "program"] [BlackType "program"] 1. Bc7 Qxc8 {(Qe8xc8 g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1R Bb2xa1 Qc5-e5+ Ba1xe5 Nc7-d5+ Kf6-e6+ Nd5-f6 Be5xf6+) -M11/128 7} 2. gxf7+ {(g6xf7+ Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-e5+ Ba1xe5 Nc7-d5+ Kf6-e6+ Nd5-f6 f7-f8Q+) +M11/68 29} Kh8 {(Kg8-h8 Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1N Bb2xa1 Nc7-d5+ Kf6-e6+ Nd5-c3 Ba1xc3+ Qc5xc3 f7-f8Q+) -M10/235 13} 3. Be5 {(Bc7-e5 Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+) +M10/74 22} Qc5 {(Qc8-c5 Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1N Bb2xa1 Nc7-d5+ Kf6-e6+ Nd5-c3 Ba1xc3+ Qc5xc3 f7-f8Q+) -M9/226 5} 4. Bb2 {(Be5-b2 Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+) +M9/82 20} Nc7 {(Na8-c7 Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1N Bb2xa1 Nc7-d5+ Kf6-e6+ Nd5-c3 Ba1xc3+ Qc5xc3 f7-f8Q+) -M8/245 1} 5. Ba1 {(Bb2-a1 a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1Q Bb2xa1 Qc5-c3+ Ba1xc3 Nc7-d5+ Kf6-e6+ Nd5xc3 f7-f8Q+) +M8/85 2} a4 {(a5-a4 Ba1-b2 a4-a3 Bb2-a1 a3-a2 Ba1-b2 a2-a1N Bb2xa1 Nc7-d5+ Kf6-e6+ Nd5-c3 Ba1xc3+ Qc5xc3 f7-f8Q+) -M7/245 1 Black resigns} *[/pgn]
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acase
Posts: 998
Joined: Wed Mar 15, 2006 1:14 am
Location: Columbus, Ohio USA
Full name: Andrew R Case

Re: Chess engines STRUGGLING to solve this puzzle

Post by acase »

Chessqueen wrote: ↑Thu Dec 28, 2023 5:50 pm
towforce wrote: ↑Thu Dec 28, 2023 5:07 pm I loaded that fen into my chess.com analysis page, and it gave me the M2 almost immediately?

FWIW I'm pretty sure I would have missed that M2 in an actual game.
TRY to Solve this puzzle
White to play and WIN, Please let Stockfish to defend the Black pieces and chose whatever chess engine you like to solve it, Crystal, Hunt Etc..

[pgn][Event "White to play and Win"] [Date "2023.12.28"] [Round "?"] [White "Any Engine"] [Black "Stockfish-windows-x86-64-avx2x"] [Result "*"] [BlackElo "3500"] [Time "10:22:09"] [WhiteElo "????"] [SetUp "1"] [FEN "n1QBq1k1/5p1p/5KP1/p7/8/8/8/8 w - - 0 1"] [Termination "unterminated"] [PlyCount "0"][/pgn]
Here you are, Crystal 6

Code: Select all

FEN: n1QBq1k1/5p1p/5KP1/p7/8/8/8/8 w - - 0 1

Crystal 6 PMT bmi2:
classical evaluation enabled
 1/1	00:00	 1k	691k	+0.10	1.g6xh7+ Kg8xh7
 2/2	00:00	 3k	1,480k	+0.23	1.g6xh7+ Kg8xh7
 3/3	00:00	 8k	3,949k	+0.22	1.g6xh7+ Kg8-h8 2.Qc8xa8
 4/4	00:00	 9k	2,982k	+0.09	1.g6xh7+ Kg8-h8 2.Qc8xa8 Qe8-e6+ 3.Kf6-g5 Kh8xh7 4.Bd8xa5
 5/5	00:00	 25k	8,442k	 0.00	1.g6xf7+ Qe8xf7+ 2.Kf6-e5 Qf7-e8+ 3.Ke5-f6
 6/8	00:00	 33k	8,248k	-0.02	1.g6xh7+ Kg8-h8 2.Kf6-g5 Kh8xh7 3.Qc8-h3+ Kh7-g8
 7/8	00:00	 42k	10,528k	 0.00	1.g6xh7+ Kg8-h8 2.Qc8xa8 Qe8-e6+ 3.Kf6-g5 Qe6-e3+ 4.Kg5-h4
 8/10	00:00	 78k	15,642k	+0.09	1.g6xh7+ Kg8-h8 2.Qc8xa8 Qe8-e6+ 3.Kf6-g5 Kh8xh7 4.Qa8-b7 Qe6-e5+ 5.Kg5-g4
 9/16	00:00	 172k	19,077k	+0.09	1.g6xh7+ Kg8-h8 2.Qc8xa8 Qe8-e6+ 3.Kf6-g5 Kh8xh7 4.Qa8-h1+ Kh7-g8 5.Bd8-f6 Qe6-e3+ 6.Kg5-h5 Qe3-e2+ 7.Kh5-h6 Qe2-e3+
 10/20	00:00	 265k	22,073k	 0.00	1.g6xh7+ Kg8-h8 2.Qc8xa8 Qe8-e6+ 3.Kf6-g5 Kh8xh7 4.Qa8-h1+ Kh7-g8 5.Bd8-f6 Qe6-e3+ 6.Kg5-h5 Qe3-e2+ 7.Kh5-h6 Qe2-e3+
 11/19	00:00	 328k	23,428k	 0.00	1.g6xh7+ Kg8-h8 2.Qc8xa8 Qe8-e6+ 3.Kf6-g5 Kh8xh7 4.Qa8-b7 Qe6-e5+ 5.Kg5-g4 Qe5-d4+ 6.Kg4-f3 Qd4-d3+ 7.Kf3-f2 Qd3-c2+ 8.Kf2-e3 Qc2-c3+ 9.Ke3-f2
 12/19	00:00	 414k	24,372k	 0.00	1.g6xh7+ Kg8-h8 2.Qc8xa8 Qe8-e6+ 3.Kf6-g5 Kh8xh7 4.Qa8-b7 Qe6-e5+ 5.Kg5-g4 Qe5-d4+ 6.Kg4-f3 Qd4-d3+ 7.Kf3-f2 Qd3-c2+ 8.Kf2-e3 Qc2-c3+ 9.Ke3-f2
 13/19	00:00	 564k	25,643k	 0.00	1.g6xh7+ Kg8-h8 2.Qc8xa8 Qe8-e6+ 3.Kf6-g5 Kh8xh7 4.Qa8-b7 Qe6-e5+ 5.Kg5-g4 Qe5-d4+ 6.Kg4-f3 Qd4-d3+ 7.Kf3-f2 Qd3-c2+ 8.Kf2-e3 Qc2-c3+ 9.Ke3-f2
 14/21	00:00	 1,250k	32,062k	+M12	1.Bd8-c7 Qe8xc8 2.g6xf7+ Kg8-h8 3.Bc7-e5 Qc8-c5 4.Be5-b2 Na8-c7 5.Bb2-a1 a5-a4 6.Ba1-b2 a4-a3 7.Bb2-a1 a3-a2 8.Ba1-b2 a2-a1R 9.Bb2xa1 Nc7-d5+ 10.Kf6-e6+ Nd5-c3 11.Ba1xc3+ Qc5xc3
 15/23	00:00	 1,564k	33,989k	+M12	1.Bd8-c7 Qe8xc8 2.g6xf7+ Kg8-h8 3.Bc7-e5 Qc8-c5 4.Be5-b2 Na8-c7 5.Bb2-a1 a5-a4 6.Ba1-b2 a4-a3 7.Bb2-a1 a3-a2 8.Ba1-b2 a2-a1Q 9.Bb2xa1 Nc7-d5+ 10.Kf6-e6+ Nd5-c3 11.Ba1xc3+ Qc5xc3 12.f7-f8Q+
 16/23	00:00	 2,077k	36,444k	+M12	1.Bd8-c7 Qe8xc8 2.g6xf7+ Kg8-h8 3.Bc7-e5 Qc8-c5 4.Be5-b2 Na8-c7 5.Bb2-a1 a5-a4 6.Ba1-b2 a4-a3 7.Bb2-a1 a3-a2 8.Ba1-b2 a2-a1Q 9.Bb2xa1 Nc7-d5+ 10.Kf6-e6+ Nd5-c3 11.Ba1xc3+ Qc5xc3 12.f7-f8Q+
 17/23	00:00	 2,820k	38,629k	+M12	1.Bd8-c7 Qe8xc8 2.g6xf7+ Kg8-h8 3.Bc7-e5 Qc8-c5 4.Be5-b2 Na8-c7 5.Bb2-a1 a5-a4 6.Ba1-b2 a4-a3 7.Bb2-a1 a3-a2 8.Ba1-b2 a2-a1Q 9.Bb2xa1 Nc7-d5+ 10.Kf6-e6+ Nd5-c3 11.Ba1xc3+ Qc5xc3 12.f7-f8Q+
 18/23	00:00	 3,689k	40,095k	+M12	1.Bd8-c7 Qe8xc8 2.g6xf7+ Kg8-h8 3.Bc7-e5 Qc8-c5 4.Be5-b2 Na8-c7 5.Bb2-a1 a5-a4 6.Ba1-b2 a4-a3 7.Bb2-a1 a3-a2 8.Ba1-b2 a2-a1Q 9.Bb2xa1 Nc7-d5+ 10.Kf6-e6+ Nd5-c3 11.Ba1xc3+ Qc5xc3 12.f7-f8Q+
 19/23	00:00	 4,724k	41,077k	+M12	1.Bd8-c7 Qe8xc8 2.g6xf7+ Kg8-h8 3.Bc7-e5 Qc8-c5 4.Be5-b2 Na8-c7 5.Bb2-a1 a5-a4 6.Ba1-b2 a4-a3 7.Bb2-a1 a3-a2 8.Ba1-b2 a2-a1Q 9.Bb2xa1 Nc7-d5+ 10.Kf6-e6+ Nd5-c3 11.Ba1xc3+ Qc5xc3 12.f7-f8Q+
 20/23	00:00	 6,102k	41,795k	+M12	1.Bd8-c7 Qe8xc8 2.g6xf7+ Kg8-h8 3.Bc7-e5 Qc8-c5 4.Be5-b2 Na8-c7 5.Bb2-a1 a5-a4 6.Ba1-b2 a4-a3 7.Bb2-a1 a3-a2 8.Ba1-b2 a2-a1Q 9.Bb2xa1 Nc7-d5+ 10.Kf6-e6+ Nd5-c3 11.Ba1xc3+ Qc5xc3 12.f7-f8Q+
 21/23	00:00	 7,760k	42,637k	+M12	1.Bd8-c7 Qe8xc8 2.g6xf7+ Kg8-h8 3.Bc7-e5 Qc8-c5 4.Be5-b2 Na8-c7 5.Bb2-a1 a5-a4 6.Ba1-b2 a4-a3 7.Bb2-a1 a3-a2 8.Ba1-b2 a2-a1Q 9.Bb2xa1 Nc7-d5+ 10.Kf6-e6+ Nd5-c3 11.Ba1xc3+ Qc5xc3 12.f7-f8Q+
 22/23	00:00	 9,736k	43,269k	+M12	1.Bd8-c7 Qe8xc8 2.g6xf7+ Kg8-h8 3.Bc7-e5 Qc8-c5 4.Be5-b2 Na8-c7 5.Bb2-a1 a5-a4 6.Ba1-b2 a4-a3 7.Bb2-a1 a3-a2 8.Ba1-b2 a2-a1Q 9.Bb2xa1 Nc7-d5+ 10.Kf6-e6+ Nd5-c3 11.Ba1xc3+ Qc5xc3 12.f7-f8Q+
 23/23	00:00	 12,177k	43,800k	+M12	1.Bd8-c7 Qe8xc8 2.g6xf7+ Kg8-h8 3.Bc7-e5 Qc8-c5 4.Be5-b2 Na8-c7 5.Bb2-a1 a5-a4 6.Ba1-b2 a4-a3 7.Bb2-a1 a3-a2 8.Ba1-b2 a2-a1Q 9.Bb2xa1 Nc7-d5+ 10.Kf6-e6+ Nd5-c3 11.Ba1xc3+ Qc5xc3 12.f7-f8Q+
 24/23	00:00	 15,460k	44,046k	+M12	1.Bd8-c7 Qe8xc8 2.g6xf7+ Kg8-h8 3.Bc7-e5 Qc8-c5 4.Be5-b2 Na8-c7 5.Bb2-a1 a5-a4 6.Ba1-b2 a4-a3 7.Bb2-a1 a3-a2 8.Ba1-b2 a2-a1Q 9.Bb2xa1 Nc7-d5+ 10.Kf6-e6+ Nd5-c3 11.Ba1xc3+ Qc5xc3 12.f7-f8Q+
 25/23	00:00	 19,458k	44,222k	+M12	1.Bd8-c7 Qe8xc8 2.g6xf7+ Kg8-h8 3.Bc7-e5 Qc8-c5 4.Be5-b2 Na8-c7 5.Bb2-a1 a5-a4 6.Ba1-b2 a4-a3 7.Bb2-a1 a3-a2 8.Ba1-b2 a2-a1Q 9.Bb2xa1 Nc7-d5+ 10.Kf6-e6+ Nd5-c3 11.Ba1xc3+ Qc5xc3 12.f7-f8Q+
 26/23	00:00	 25,084k	44,633k	+M12	1.Bd8-c7 Qe8xc8 2.g6xf7+ Kg8-h8 3.Bc7-e5 Qc8-c5 4.Be5-b2 Na8-c7 5.Bb2-a1 a5-a4 6.Ba1-b2 a4-a3 7.Bb2-a1 a3-a2 8.Ba1-b2 a2-a1Q 9.Bb2xa1 Nc7-d5+ 10.Kf6-e6+ Nd5-c3 11.Ba1xc3+ Qc5xc3 12.f7-f8Q+
 27/23	00:00	 32,715k	45,249k	+M12	1.Bd8-c7 Qe8xc8 2.g6xf7+ Kg8-h8 3.Bc7-e5 Qc8-c5 4.Be5-b2 Na8-c7 5.Bb2-a1 a5-a4 6.Ba1-b2 a4-a3 7.Bb2-a1 a3-a2 8.Ba1-b2 a2-a1Q 9.Bb2xa1 Nc7-d5+ 10.Kf6-e6+ Nd5-c3 11.Ba1xc3+ Qc5xc3 12.f7-f8Q+
 28/23	00:00	 41,453k	45,856k	+M12	1.Bd8-c7 Qe8xc8 2.g6xf7+ Kg8-h8 3.Bc7-e5 Qc8-c5 4.Be5-b2 Na8-c7 5.Bb2-a1 a5-a4 6.Ba1-b2 a4-a3 7.Bb2-a1 a3-a2 8.Ba1-b2 a2-a1Q 9.Bb2xa1 Nc7-d5+ 10.Kf6-e6+ Nd5-c3 11.Ba1xc3+ Qc5xc3 12.f7-f8Q+
 29/23	00:00	 45,956k	46,608k	+M12	1.Bd8-c7 Qe8xc8 2.g6xf7+ Kg8-h8 3.Bc7-e5 Qc8-c5 4.Be5-b2 Na8-c7 5.Bb2-a1 a5-a4 6.Ba1-b2 a4-a3 7.Bb2-a1 a3-a2 8.Ba1-b2 a2-a1Q 9.Bb2xa1 Nc7-d5+ 10.Kf6-e6+ Nd5-c3 11.Ba1xc3+ Qc5xc3 12.f7-f8Q+
And your favorite emoji... :roll:
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acase
Posts: 998
Joined: Wed Mar 15, 2006 1:14 am
Location: Columbus, Ohio USA
Full name: Andrew R Case

Re: Chess engines STRUGGLING to solve this puzzle

Post by acase »

DmitriyFrosty wrote: ↑Thu Dec 28, 2023 4:47 pm Little bit probably)
Fen: 2kr4/K1pp4/1p6/8/8/8/7Q/3R4 w - - 0 1
White mates in two.
Hmmm, every engine I tried solved this in under 1 second, here is Ruffian 1.0.5 from 20 years ago running on 1 thread with a 128mb hashtable:

Code: Select all

FEN: 2kr4/K1pp4/1p6/8/8/8/7Q/3R4 w - - 0 1

Ruffian 1.0.5:
 1/1	00:00	 2	0	+5.70	1.Rd1-a1
 1/1	00:00	 5	0	+5.71	1.Rd1-e1
 1/3	00:00	 20	0	+5.86	1.Qh2-b2
 1/3	00:00	 21	0	+5.88	1.Qh2-c2
 1/3	00:00	 40	0	+6.11	1.Ka7-a6
 2/5	00:00	 81	0	+5.89	1.Ka7-a6 d7-d5
 2/5	00:00	 139	0	+5.95	1.Qh2-e5 d7-d6
 3/7	00:00	 746	0	+6.09	1.Qh2-e5 d7-d6 2.Qe5-f5+ Rd8-d7 3.Ka7-a6
 3/7	00:00	 889	0	+6.24	1.Ka7-a6 d7-d5 2.Ka6-b5
 4/8	00:00	 2k	0	+6.23	1.Ka7-a6 Kc8-b8 2.Ka6-b5 d7-d5
 5/10	00:00	 5k	0	+6.33	1.Ka7-a6 d7-d6 2.Ka6-b5 Kc8-b7 3.Rd1-e1
 5/17	00:00	 14k	0	+6.96	1.Rd1-c1 d7-d6 2.Qh2-g1 d6-d5 3.Qg1-g4+ Rd8-d7 4.Qg4-g8+ Rd7-d8 5.Qg8-e6+ Rd8-d7 6.Qe6xb6
 6/19	00:00	 37k	0	+M7	1.Rd1-c1 d7-d6 2.Qh2-h7 Rd8-d7 3.Qh7-g8+ Rd7-d8 4.Qg8-e6+ Rd8-d7 5.Qe6-e8+ Rd7-d8 6.Qe8-c6 Rd8-d7 7.Qc6-a8+
 7/19	00:00	 65k	6,484k	+M7	1.Rd1-c1 d7-d6 2.Qh2-h7 Rd8-d7 3.Qh7-g8+ Rd7-d8 4.Qg8-e6+ Rd8-d7 5.Qe6-e8+ Rd7-d8 6.Qe8-c6 Rd8-d7 7.Qc6-a8+
 8/19	00:00	 122k	12,167k	+M6	1.Rd1-c1 d7-d6 2.Qh2-h3+ Rd8-d7 3.Rc1-e1 c7-c6+ 4.Ka7xb6 Kc8-b8 5.Re1-e8+ Rd7-d8 6.Re8xd8+
 9/19	00:00	 209k	5,231k	+M6	1.Rd1-c1 d7-d6 2.Qh2-h3+ Rd8-d7 3.Rc1-e1 c7-c6+ 4.Ka7xb6 Kc8-b8 5.Re1-e8+ Rd7-d8 6.Re8xd8+
 10/19	00:00	 312k	5,194k	+M6	1.Rd1-c1 d7-d6 2.Qh2-h3+ Rd8-d7 3.Rc1-e1 c7-c6+ 4.Ka7xb6 Kc8-b8 5.Re1-e8+ Rd7-d8 6.Re8xd8+
 10/19	00:00	 538k	4,887k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 11/19	00:00	 538k	4,888k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 12/19	00:00	 538k	4,889k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 13/19	00:00	 538k	4,890k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 14/19	00:00	 538k	4,892k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 15/19	00:00	 538k	4,893k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 16/19	00:00	 538k	4,894k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 17/19	00:00	 538k	4,895k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 18/19	00:00	 539k	4,897k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 19/19	00:00	 539k	4,898k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 20/19	00:00	 539k	4,899k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 21/19	00:00	 539k	4,900k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 22/19	00:00	 539k	4,902k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 23/19	00:00	 539k	4,903k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 24/19	00:00	 539k	4,904k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 25/19	00:00	 540k	4,905k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 26/19	00:00	 540k	4,907k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 27/19	00:00	 540k	4,908k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 28/19	00:00	 540k	4,909k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 29/19	00:00	 540k	4,910k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 30/19	00:00	 540k	4,912k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 31/19	00:00	 540k	4,913k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 32/19	00:00	 541k	4,914k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 33/19	00:00	 541k	4,916k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 34/19	00:00	 541k	4,917k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 35/19	00:00	 541k	4,918k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 36/19	00:00	 541k	4,919k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 37/19	00:00	 541k	4,921k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 38/19	00:00	 541k	4,922k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 39/19	00:00	 542k	4,923k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 40/19	00:00	 542k	4,925k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 41/19	00:00	 542k	4,926k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 42/19	00:00	 542k	4,927k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 43/19	00:00	 542k	4,929k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 44/19	00:00	 542k	4,930k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 45/19	00:00	 542k	4,931k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 46/19	00:00	 543k	4,933k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 47/19	00:00	 543k	4,934k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 48/19	00:00	 543k	4,936k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 49/19	00:00	 543k	4,937k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 50/19	00:00	 543k	4,938k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 51/19	00:00	 543k	4,940k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 52/19	00:00	 544k	4,941k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 53/19	00:00	 544k	4,942k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 54/19	00:00	 544k	4,944k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 55/19	00:00	 544k	4,945k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 56/19	00:00	 544k	4,947k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 57/19	00:00	 544k	4,948k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 58/19	00:00	 544k	4,949k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 59/19	00:00	 545k	4,951k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 60/19	00:00	 545k	4,952k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 61/19	00:00	 545k	4,954k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 62/19	00:00	 545k	4,955k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 63/19	00:00	 545k	4,957k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 64/19	00:00	 545k	4,958k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
The better challenge would be is what engine doesn't solve this.
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Chessqueen
Posts: 5685
Joined: Wed Sep 05, 2018 2:16 am
Location: Moving
Full name: Jorge Picado

Re: Chess engines STRUGGLING to solve this puzzle

Post by Chessqueen »

Even Bikjump rated 2125 solve this in 1 second

FEN: 2kr4/K1pp4/1p6/8/8/8/7Q/3R4 w - - 0 1

FEN: 2kr4/K1pp4/1p6/8/8/8/7Q/3R4 w - - 0 1

Bikjump:
1/4 00:00 9 147 +1.45 Rd1xd7
1/4 00:00 12 196 +5.06 Rd1-h1
1/4 00:00 17 278 +5.09 Rd1-c1
1/4 00:00 21 344 +5.26 Rd1-d6 Rd8-g8
2/2 00:00 48 786 +5.26 Rd1-d6 Rd8-g8
2/6 00:00 103 2k +M2 Qh2-d6 c7xd6
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Chessqueen
Posts: 5685
Joined: Wed Sep 05, 2018 2:16 am
Location: Moving
Full name: Jorge Picado

Re: Chess engines STRUGGLING to solve this puzzle

Post by Chessqueen »

And Chers rated only 1700

FEN: 2kr4/K1pp4/1p6/8/8/8/7Q/3R4 w - - 0 1

Chers:
1/5 00:00 44 0 +6.37 Qh2-e5
2/7 00:00 377 0 +6.35 Qh2-e5 d7-d6
3/9 00:00 3k 1,382k +289.97 Qh2-d6 c7xd6 Rd1-c1+
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DmitriyFrosty
Posts: 58
Joined: Mon Mar 27, 2023 8:29 pm
Full name: Dmitry Frosty

Re: Chess engines STRUGGLING to solve this puzzle

Post by DmitriyFrosty »

acase wrote: ↑Sat Dec 30, 2023 3:24 am
DmitriyFrosty wrote: ↑Thu Dec 28, 2023 4:47 pm Little bit probably)
Fen: 2kr4/K1pp4/1p6/8/8/8/7Q/3R4 w - - 0 1
White mates in two.
Hmmm, every engine I tried solved this in under 1 second, here is Ruffian 1.0.5 from 20 years ago running on 1 thread with a 128mb hashtable:

Code: Select all

FEN: 2kr4/K1pp4/1p6/8/8/8/7Q/3R4 w - - 0 1

Ruffian 1.0.5:
 1/1	00:00	 2	0	+5.70	1.Rd1-a1
 1/1	00:00	 5	0	+5.71	1.Rd1-e1
 1/3	00:00	 20	0	+5.86	1.Qh2-b2
 1/3	00:00	 21	0	+5.88	1.Qh2-c2
 1/3	00:00	 40	0	+6.11	1.Ka7-a6
 2/5	00:00	 81	0	+5.89	1.Ka7-a6 d7-d5
 2/5	00:00	 139	0	+5.95	1.Qh2-e5 d7-d6
 3/7	00:00	 746	0	+6.09	1.Qh2-e5 d7-d6 2.Qe5-f5+ Rd8-d7 3.Ka7-a6
 3/7	00:00	 889	0	+6.24	1.Ka7-a6 d7-d5 2.Ka6-b5
 4/8	00:00	 2k	0	+6.23	1.Ka7-a6 Kc8-b8 2.Ka6-b5 d7-d5
 5/10	00:00	 5k	0	+6.33	1.Ka7-a6 d7-d6 2.Ka6-b5 Kc8-b7 3.Rd1-e1
 5/17	00:00	 14k	0	+6.96	1.Rd1-c1 d7-d6 2.Qh2-g1 d6-d5 3.Qg1-g4+ Rd8-d7 4.Qg4-g8+ Rd7-d8 5.Qg8-e6+ Rd8-d7 6.Qe6xb6
 6/19	00:00	 37k	0	+M7	1.Rd1-c1 d7-d6 2.Qh2-h7 Rd8-d7 3.Qh7-g8+ Rd7-d8 4.Qg8-e6+ Rd8-d7 5.Qe6-e8+ Rd7-d8 6.Qe8-c6 Rd8-d7 7.Qc6-a8+
 7/19	00:00	 65k	6,484k	+M7	1.Rd1-c1 d7-d6 2.Qh2-h7 Rd8-d7 3.Qh7-g8+ Rd7-d8 4.Qg8-e6+ Rd8-d7 5.Qe6-e8+ Rd7-d8 6.Qe8-c6 Rd8-d7 7.Qc6-a8+
 8/19	00:00	 122k	12,167k	+M6	1.Rd1-c1 d7-d6 2.Qh2-h3+ Rd8-d7 3.Rc1-e1 c7-c6+ 4.Ka7xb6 Kc8-b8 5.Re1-e8+ Rd7-d8 6.Re8xd8+
 9/19	00:00	 209k	5,231k	+M6	1.Rd1-c1 d7-d6 2.Qh2-h3+ Rd8-d7 3.Rc1-e1 c7-c6+ 4.Ka7xb6 Kc8-b8 5.Re1-e8+ Rd7-d8 6.Re8xd8+
 10/19	00:00	 312k	5,194k	+M6	1.Rd1-c1 d7-d6 2.Qh2-h3+ Rd8-d7 3.Rc1-e1 c7-c6+ 4.Ka7xb6 Kc8-b8 5.Re1-e8+ Rd7-d8 6.Re8xd8+
 10/19	00:00	 538k	4,887k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 11/19	00:00	 538k	4,888k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 12/19	00:00	 538k	4,889k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 13/19	00:00	 538k	4,890k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 14/19	00:00	 538k	4,892k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 15/19	00:00	 538k	4,893k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 16/19	00:00	 538k	4,894k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 17/19	00:00	 538k	4,895k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 18/19	00:00	 539k	4,897k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 19/19	00:00	 539k	4,898k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 20/19	00:00	 539k	4,899k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 21/19	00:00	 539k	4,900k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 22/19	00:00	 539k	4,902k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 23/19	00:00	 539k	4,903k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 24/19	00:00	 539k	4,904k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 25/19	00:00	 540k	4,905k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 26/19	00:00	 540k	4,907k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 27/19	00:00	 540k	4,908k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 28/19	00:00	 540k	4,909k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 29/19	00:00	 540k	4,910k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 30/19	00:00	 540k	4,912k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 31/19	00:00	 540k	4,913k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 32/19	00:00	 541k	4,914k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 33/19	00:00	 541k	4,916k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 34/19	00:00	 541k	4,917k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 35/19	00:00	 541k	4,918k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 36/19	00:00	 541k	4,919k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 37/19	00:00	 541k	4,921k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 38/19	00:00	 541k	4,922k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 39/19	00:00	 542k	4,923k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 40/19	00:00	 542k	4,925k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 41/19	00:00	 542k	4,926k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 42/19	00:00	 542k	4,927k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 43/19	00:00	 542k	4,929k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 44/19	00:00	 542k	4,930k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 45/19	00:00	 542k	4,931k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 46/19	00:00	 543k	4,933k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 47/19	00:00	 543k	4,934k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 48/19	00:00	 543k	4,936k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 49/19	00:00	 543k	4,937k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 50/19	00:00	 543k	4,938k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 51/19	00:00	 543k	4,940k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 52/19	00:00	 544k	4,941k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 53/19	00:00	 544k	4,942k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 54/19	00:00	 544k	4,944k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 55/19	00:00	 544k	4,945k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 56/19	00:00	 544k	4,947k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 57/19	00:00	 544k	4,948k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 58/19	00:00	 544k	4,949k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 59/19	00:00	 545k	4,951k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 60/19	00:00	 545k	4,952k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 61/19	00:00	 545k	4,954k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 62/19	00:00	 545k	4,955k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 63/19	00:00	 545k	4,957k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
 64/19	00:00	 545k	4,958k	+M2	1.Qh2-d6 c7xd6 2.Rd1-c1+
The better challenge would be is what engine doesn't solve this.
Alexandria, Berserk, Caissa, Clover doesn't see mate for me immediately.
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Ciekce
Posts: 197
Joined: Sun Oct 30, 2022 5:26 pm
Full name: Conor Anstey

Re: Chess engines STRUGGLING to solve this puzzle

Post by Ciekce »

stormphrax gets this immediately

Code: Select all

position fen 2kr4/K1pp4/1p6/8/8/8/7Q/3R4 w - - 0 1
go
info depth 1 seldepth 2 time 0 nodes 38 nps 855855 score cp 722 wdl 1000 0 0 hashfull 0 pv h2g2
info depth 2 seldepth 4 time 0 nodes 83 nps 169422 score cp 740 wdl 1000 0 0 hashfull 0 pv h2g2 b6b5
info depth 3 seldepth 5 time 1 nodes 395 nps 375582 score cp 741 wdl 1000 0 0 hashfull 0 pv h2g3 d7d5 d1c1
info depth 4 seldepth 6 time 1 nodes 618 nps 381105 score cp 758 wdl 1000 0 0 hashfull 0 pv h2h3 b6b5 a7a6 c7c6
info depth 5 seldepth 7 time 2 nodes 1785 nps 686855 score cp 732 wdl 1000 0 0 hashfull 0 pv h2f4 d7d6 d1b1 d8d7 b1b4
info depth 6 seldepth 9 time 3 nodes 3001 nps 790485 score cp 743 wdl 1000 0 0 hashfull 0 pv h2f4 d7d6 f4h4 d6d5 d1e1 d8d6
info depth 7 seldepth 9 time 4 nodes 4075 nps 853760 score cp 758 wdl 1000 0 0 hashfull 0 pv h2f4 b6b5 f4e5 d8f8 d1c1
info depth 8 seldepth 10 time 5 nodes 4997 nps 881958 score cp 790 wdl 1000 0 0 hashfull 0 pv d1c1 d7d6 h2c2 d8d7 c2c6
info depth 9 seldepth 14 time 7 nodes 7202 nps 1019348 score cp 784 wdl 1000 0 0 hashfull 0 pv d1c1 d7d6 h2h7 d8d7 h7h3 d6d5 h3g4 d5d4
info depth 10 seldepth 14 time 8 nodes 8119 nps 1012925 score cp 815 wdl 1000 0 0 hashfull 0 pv d1c1 d7d6 h2h7 d8d7 h7g8 d7d8 g8d5 d8e8
info depth 11 seldepth 17 time 9 nodes 9909 nps 1057151 score cp 863 wdl 1000 0 0 hashfull 0 pv d1c1 d7d6 h2h7 d8d7 h7g8 d7d8 g8f7 d8d7 f7e8 d7d8 e8c6
info depth 12 seldepth 16 time 12 nodes 14945 nps 1227545 score cp 9242 wdl 1000 0 0 hashfull 0 pv d1c1 d7d6 h2h7 d8d7 h7g8 d7d8 g8f7 d8d7 f7e8 d7d8 e8c6
info depth 13 seldepth 13 time 13 nodes 15920 nps 1201164 score mate 7 wdl 1000 0 0 hashfull 0 pv d1c1 d7d6 h2h7 d8d7 h7g8 d7d8 g8f7 d8d7 f7e8 d7d8 e8c6 d8g8 c6c7
info depth 14 seldepth 13 time 14 nodes 18026 nps 1229092 score mate 7 wdl 1000 0 0 hashfull 0 pv d1c1 d7d6 h2h7 d8d7 h7g8 d7d8 g8f7 d8d7 f7e8 d7d8 e8c6 d8g8 c6c7
info depth 15 seldepth 17 time 16 nodes 20730 nps 1273067 score mate 7 wdl 1000 0 0 hashfull 0 pv d1c1 d7d6 h2h7 d8d7 h7g8 d7d8 g8f7 d8d7 f7e8 d7d8 e8c6 d8g8 c6c7
info depth 16 seldepth 20 time 18 nodes 23604 nps 1310969 score mate 7 wdl 1000 0 0 hashfull 0 pv d1c1 d7d6 h2h7 d8d7 h7g8 d7d8 g8f7 d8d7 f7e8 d7d8 e8c6 d8g8 c6c7
info depth 17 seldepth 20 time 19 nodes 26648 nps 1352353 score mate 7 wdl 1000 0 0 hashfull 0 pv d1c1 d7d6 h2h7 d8d7 h7g8 d7d8 g8f7 d8d7 f7e8 d7d8 e8c6 d8g8 c6c7
info depth 18 seldepth 23 time 21 nodes 31208 nps 1429507 score mate 7 wdl 1000 0 0 hashfull 0 pv d1c1 d7d6 h2h7 d8d7 h7g8 d7d8 g8f7 d8d7 f7e8 d7d8 e8c6 d8g8 c6c7
info depth 19 seldepth 18 time 25 nodes 39138 nps 1559475 score mate 7 wdl 1000 0 0 hashfull 0 pv d1c1 d7d6 h2h7 d8d7 h7g8 d7d8 g8f7 d8d7 f7e8 d7d8 e8c6 d8g8 c6c7
info depth 20 seldepth 20 time 30 nodes 51053 nps 1692463 score mate 7 wdl 1000 0 0 hashfull 2 pv d1c1 d7d6 h2h7 d8d7 h7g8 d7d8 g8f7 d8d7 f7e8 d7d8 e8c6 d8g8 c6c7
info depth 21 seldepth 25 time 34 nodes 63226 nps 1812058 score mate 7 wdl 1000 0 0 hashfull 2 pv d1c1 d7d6 h2h7 d8d7 h7g8 d7d8 g8f7 d8d7 f7e8 d7d8 e8c6 d8g8 c6c7
info depth 22 seldepth 25 time 40 nodes 79041 nps 1928384 score mate 7 wdl 1000 0 0 hashfull 2 pv d1c1 d7d6 h2h7 d8d7 h7g8 d7d8 g8f7 d8d7 f7e8 d7d8 e8c6 d8g8 c6c7
info depth 23 seldepth 29 time 50 nodes 106280 nps 2087535 score mate 7 wdl 1000 0 0 hashfull 2 pv d1c1 d7d6 h2h7 d8d7 h7g8 d7d8 g8f7 d8d7 f7e8 d7d8 e8c6 d8g8 c6c7
info depth 24 seldepth 26 time 59 nodes 131669 nps 2199325 score mate 7 wdl 1000 0 0 hashfull 2 pv d1c1 d7d6 h2h7 d8d7 h7g8 d7d8 g8f7 d8d7 f7e8 d7d8 e8c6 d8g8 c6c7
info depth 25 seldepth 27 time 81 nodes 186840 nps 2306370 score mate 7 wdl 1000 0 0 hashfull 3 pv d1c1 d7d6 h2h7 d8d7 h7g8 d7d8 g8f7 d8d7 f7e8 d7d8 e8c6 d8g8 c6c7
info depth 26 seldepth 28 time 91 nodes 214424 nps 2332163 score mate 2 wdl 1000 0 0 hashfull 3 pv h2d6 c7d6 d1c1
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JohnW
Posts: 403
Joined: Thu Nov 22, 2012 12:20 am
Location: New Hampshire

Re: Chess engines STRUGGLING to solve this puzzle

Post by JohnW »

DmitriyFrosty wrote: ↑Thu Dec 28, 2023 4:47 pm Little bit probably)
Fen: 2kr4/K1pp4/1p6/8/8/8/7Q/3R4 w - - 0 1
White mates in two.
It's more difficult to find an engine that can't solve it instantly. Komodo 5 and Stockfish 2.3.1 found it instantly
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